include/asm-sparc64/auxio.h

   1 /* $Id: auxio.h,v 1.2 1999/09/21 14:39:25 davem Exp $
   2  * auxio.h:  Definitions and code for the Auxiliary I/O register.
   3  *
   4  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   5  */
   6 #ifndef _SPARC64_AUXIO_H
   7 #define _SPARC64_AUXIO_H
   8
   9 #include <asm/system.h>
  10
  11 /* FIXME: All of this should be checked for sun4u. It has /sbus/auxio, but
  12    I don't know whether it is the same and don't have a floppy */
  13
  14 extern unsigned long auxio_register;
  15
  16 /* This register is an unsigned char in IO space.  It does two things.
  17  * First, it is used to control the front panel LED light on machines
  18  * that have it (good for testing entry points to trap handlers and irq's)
  19  * Secondly, it controls various floppy drive parameters.
  20  */
  21 #define AUXIO_ORMEIN      0xf0    /* All writes must set these bits. */
  22 #define AUXIO_ORMEIN4M    0xc0    /* sun4m - All writes must set these bits. */
  23 #define AUXIO_FLPY_DENS   0x20    /* Floppy density, high if set. Read only. */
  24 #define AUXIO_FLPY_DCHG   0x10    /* A disk change occurred.  Read only. */
  25 #define AUXIO_EDGE_ON     0x10    /* sun4m - On means Jumper block is in. */
  26 #define AUXIO_FLPY_DSEL   0x08    /* Drive select/start-motor. Write only. */
  27 #define AUXIO_LINK_TEST   0x08    /* sun4m - On means TPE Carrier detect. */
  28
  29 /* Set the following to one, then zero, after doing a pseudo DMA transfer. */
  30 #define AUXIO_FLPY_TCNT   0x04    /* Floppy terminal count. Write only. */
  31
  32 /* Set the following to zero to eject the floppy. */
  33 #define AUXIO_FLPY_EJCT   0x02    /* Eject floppy disk.  Write only. */
  34 #define AUXIO_LED         0x01    /* On if set, off if unset. Read/Write */
  35
  36 #define AUXREG   (auxio_register)
  37
  38 /* These are available on sun4c */
  39 #define TURN_ON_LED   \
  40 do {    if (AUXREG) \
  41                 sbus_writeb(sbus_readb(AUXREG) | \
  42                             (AUXIO_ORMEIN | AUXIO_LED), AUXREG); \
  43 } while(0)
  44 #define TURN_OFF_LED  \
  45 do {    if (AUXREG) \
  46                 sbus_writeb((sbus_readb(AUXREG) | \
  47                              AUXIO_ORMEIN) & (~AUXIO_LED), \
  48                             AUXREG); \
  49 } while(0)
  50 #define FLIP_LED        \
  51 do {    if (AUXREG)  \
  52                 sbus_writeb((sbus_readb(AUXREG) | \
  53                              AUXIO_ORMEIN) ^ AUXIO_LEN, \
  54                             AUXREG); \
  55 } while(0)
  56 #define FLPY_MOTORON    \
  57 do {    if (AUXREG) \
  58                 sbus_writeb(sbus_readb(AUXREG) | \
  59                             (AUXIO_ORMEIN | AUXIO_FLPY_DSEL), \
  60                             AUXREG); \
  61 } while(0)
  62 #define FLPY_MOTOROFF   \
  63 do {    if (AUXREG) \
  64                 sbus_writeb((sbus_readb(AUXREG) | \
  65                              AUXIO_ORMEIN) & (~AUXIO_FLPY_DSEL), \
  66                             AUXREG); \
  67 } while(0)
  68 #define FLPY_TCNTON     \
  69 do {    if (AUXREG) \
  70                 sbus_writeb((sbus_readb(AUXREG) | \
  71                              AUXIO_ORMEIN) | AUXIO_FLPY_TCNT, \
  72                             AUXREG); \
  73 } while(0)
  74 #define FLPY_TCNTOFF    \
  75 do {    if (AUXREG) \
  76                 sbus_writeb((sbus_readb(AUXREG) | \
  77                              AUXIO_ORMEIN) & (~AUXIO_FLPY_TCNT), \
  78                             AUXREG); \
  79 } while(0)
  80
  81 #ifndef __ASSEMBLY__
  82 extern __inline__ void set_auxio(unsigned char bits_on, unsigned char bits_off)
  83 {
  84         unsigned char regval;
  85         unsigned long flags;
  86
  87         save_flags(flags); cli();
  88
  89         if(AUXREG) {
  90                 unsigned char newval;
  91
  92                 regval = sbus_readb(AUXREG);
  93                 newval  = regval | bits_on;
  94                 newval &= ~bits_off;
  95                 newval |= AUXIO_ORMEIN4M;
  96                 sbus_writeb(newval, AUXREG);
  97         }
  98         restore_flags(flags);
  99 }
 100 #endif /* !(__ASSEMBLY__) */
 101
 102
 103 /* AUXIO2 (Power Off Control) */
 104 extern __volatile__ unsigned char * auxio_power_register;
 105
 106 #define AUXIO_POWER_DETECT_FAILURE      32
 107 #define AUXIO_POWER_CLEAR_FAILURE       2
 108 #define AUXIO_POWER_OFF                 1
 109
 110
 111 #endif /* !(_SPARC_AUXIO_H) */